Striker,
I took a trip to Wo Woy, no Pelicans where I live.
Mangroves are next project !
Doug,
I'm waiting on a response from Nkon.
But having seen the test report referred to by Jonathan, its probably a trait of that lens.
I did some test exposures, at 70mm the vignetting dropped to half, at 135 F16 it has gone!
Jonathan,
Thanks for the link, very useful resource.
So far I'm impressed with the D80. The 18-135 lens is a good compromise. The focussing speed and accuracy is fantastic. Battery life is very good too, with review switched off, after 80 shots battery meter only dropped 1 bar.
Have to learn how to remove the vignetting. Paintshop Pro should have the capacity but I have to learn.
Thank you all for the very useful comments.